Preparation for dyeing the vegetable fiber



Patented Aug. 13, 1929.

UNITED STATES JULIUS RATR, OF FRANKFORT-ON-THE-MAIN, GERMANY, ASSIG-NOR'IO GENERAL ANILINE WORKS, INC., OF NEW YORK,

N. Y., A CORPORATION OF DELAWARE.

PREPARATION FOR DYEING THE VEGETABLE FIBER.

No Drawing. Original application filed February 17, 1927, Serial No;169,140, and in Germany February 22, 1926. Divided and this applicationThis application .is a division of my application Serial No. 169,140,filed February 17, 1927.

My invention relates to new dyestuff preparations consisting of mixturesof an azo dyestuff component, of a sulfur dye and preferably also ofagents necessary for dissolving and dyeing.

These preparations are suitable for carrying out the dyeing processwhich I have described in my copending application Serial No. 169,140and which consists in pro ducingmixtures of sulfur dyes with rice colorson the fiber by combining the fixation of a sulfur dye on the fiber withthe production of an insoluble azo dyestuif on the fiber according tothe ice colors method.

In order to carry out this process practically the material isimpregnated with a '20 solution, containing besides an azo component asulfur dye, dissolved in the customary manner by means of sodium sulfideor hy-' drosulfite or of both, and the ice color is developed by meansof a diazo solution and simultaneously the leuco compound is convertedinto the sulfur dye.

For this process the sulfur dyes of all classes come into consideration,as azo compounds the following may be used: the

naphthols, acylaminonaphthols such as benzoylaminonaphthols, thederivatives of the i 1-hydroxynaphthalene-l-carboxylic acid, de-

scribed in U. S. Patent No. the arylides of 2.3-hydroxynaphthoic acid,

bodies containing a methylene group which is capable of combining withdiazo-compounds, as for example pyrazolone derivatives or derivatives of,B-ketonealdehydes, such as the acyl acetic acid arylides, the

filed March 2, 1928. Serial No; 258,690.

solving and dyeing, namely Turkey red oil, anhydrous sodium sulfide,Glaubers salt and para-formaldehyde. i

In order to further illustrate my invention the following examples aregiven; I Wish it however understood that I am not limited to theparticular examples given nor to the specific conditions mentioned. Theparts are by weight and all temperatures in centigrades.

I Example 1.

tion at about 35 C., allowed to drain and rinsed with. cold water. It isdeveloped with 1, 2 kilo of diazotized 2.5-dichloroaniline in 1000liters of liquor. After an usual aftertreatment a dark reddish brown isobtained.

E wample f2.

3 kilos of the anilide of 2.3-hydroxynaphthoic acid are dissolved in theusual manner after adding 4 liters of Turkey red oil and 9 liters ofcaustic soda solution of 30 B. in about-60 liters of boiling water andthe solution is added to a dyeing liquor (1000 liters), containingfurther 3 liters of a formaldehyde solution of 30%. Simultaneously2'kilos of blue sulfur dyestulf made from parapara'-dioXy-diphenylamineby the process described in U. S. Patent 7 36,380, and 10 kilos ofcrystallized sodium sulfide are dissolved in boiling water and thissolution is also added to the dye-bath. 50 kilos of cotton yarn areimpregnated at about 50 C. for about 5 hour, squeezed, exposed to theair for some time and developed with 1 kg. of. diazotizedm-nitro-para-toluidin in I 1000 liters of liquor. After an usual aftertreatment-a bluish garnet is obtained.

Example 3.

3 kilos of diacetoacetyl-ortho-tolidin, 4 liters of Turkey red oil and 9liters of caustic soda solution of B6. are dissolved in boiling water,and this solution is added to a dye bath of 1000 liters. 5 kilos ofimmedial brilliant green color Index No. 1006 obtained.

In Example 4.

400 grs. of the anilide of 2,3-hydroxynaphthoic acid, 100 gm; of sulfurblack extra. 300 ms. of powdered caustic soda, 300 grs. of Turkey redoil and 200 grs. of anhydrous sodium sulfide are intimately mixed to anuniform powder. Then the mixture is dis solved in boiling water, thesolution is made up to liters and 400 com. of a forl'naldehyde solutionof 30% are added, the material is dyed herewith at about 25 for hour,

squeezed and developed with 350 grs. of

diazotized meta-chloroaniline in 50 liters of liquor. After an usualaftertreatment a yellowish brown is obtained.

I claim:

1. As new compounds preparations consisting of an azo dyestufi'component and a sulfur dye.

2. As new compounds ln'eparations consisting of an azo dyestullcomponent, a sulfur dye and agents, suitable for dissolving and dyeing.

3. As a new compound a preparation consisting of a mixture of theanilide of 2.3- hydroxynaphthoic acid, a black sulfur dye and agents,suitable for dissolving and dyeing. r

In testimony whereoffi atlix my signature.

JULIUS RATH.

